ABAP Select data from SAP table DB2_VIEW_SUBSYS_SUMMARY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2_VIEW_SUBSYS_SUMMARY table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to DB2_VIEW_SUBSYS_SUMMARY. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the DB2_VIEW_SUBSYS_SUMMARY table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_DB2_VIEW_SUBSYS_SUMMARY TYPE STANDARD TABLE OF DB2_VIEW_SUBSYS_SUMMARY,
      WA_DB2_VIEW_SUBSYS_SUMMARY TYPE DB2_VIEW_SUBSYS_SUMMARY,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <DB2_VIEW_SUBSYS_SUMMARY> TYPE DB2_VIEW_SUBSYS_SUMMARY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2_VIEW_SUBSYS_SUMMARY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2_VIEW_SUBSYS_SUMMARY
  INTO TABLE IT_DB2_VIEW_SUBSYS_SUMMARY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2_VIEW_SUBSYS_SUMMARY
*  INTO TABLE @DATA(IT_DB2_VIEW_SUBSYS_SUMMARY2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_DB2_VIEW_SUBSYS_SUMMARY INDEX 1 INTO DATA(WA_DB2_VIEW_SUBSYS_SUMMARY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2_VIEW_SUBSYS_SUMMARY ASSIGNING <DB2_VIEW_SUBSYS_SUMMARY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2_VIEW_SUBSYS_SUMMARY>-SUBSYSPARMS = 1.
<DB2_VIEW_SUBSYS_SUMMARY>-GLOTIMESSUM = 1.
<DB2_VIEW_SUBSYS_SUMMARY>-GTPROCESSED = 1.
<DB2_VIEW_SUBSYS_SUMMARY>-GTPROCCPU = 1.
<DB2_VIEW_SUBSYS_SUMMARY>-GTPROCZIIP = 1.

ENDLOOP.

LOOP AT IT_DB2_VIEW_SUBSYS_SUMMARY INTO WA_DB2_VIEW_SUBSYS_SUMMARY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2_VIEW_SUBSYS_SUMMARY-GTSUSPENDED, sy-vline,
  WA_DB2_VIEW_SUBSYS_SUMMARY-GTSUSPIO, sy-vline,
  WA_DB2_VIEW_SUBSYS_SUMMARY-GTSUSPLOCK, sy-vline,
  WA_DB2_VIEW_SUBSYS_SUMMARY-GTSUSPARCH, sy-vline,
  WA_DB2_VIEW_SUBSYS_SUMMARY-GTSUSPDS, sy-vline,
  WA_DB2_VIEW_SUBSYS_SUMMARY-GTSUSPTASK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2_VIEW_SUBSYS_SUMMARY you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_DB2_VIEW_SUBSYS_SUMMARY TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_DB2_VIEW_SUBSYS_SUMMARY INTO WA_DB2_VIEW_SUBSYS_SUMMARY.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DB2_VIEW_SUBSYS_SUMMARY_STR, 
SUBSYSPARMS TYPE STRING,
GLOTIMESSUM TYPE STRING,
GTPROCESSED TYPE STRING,
GTPROCCPU TYPE STRING,
GTPROCZIIP TYPE STRING,
GTSUSPENDED TYPE STRING,
GTSUSPIO TYPE STRING,
GTSUSPLOCK TYPE STRING,
GTSUSPARCH TYPE STRING,
GTSUSPDS TYPE STRING,
GTSUSPTASK TYPE STRING,
AVGIORESPTIME TYPE STRING,
GTRESPTIMEDB2 TYPE STRING,
GTRESPTIMEALL TYPE STRING,
LOCKESCAL TYPE STRING,
TIMEOUTS TYPE STRING,
DEADLOCKS TYPE STRING,
LONGRUN TYPE STRING,
ACTLOGSHORT TYPE STRING,
LOGBUFF TYPE STRING,
GCONTRATE TYPE STRING,
FCONTRATE TYPE STRING,
BPSHORT TYPE STRING,
GHITRATE TYPE STRING,
SORTWFHWM TYPE STRING,
REALSTORAGEDBM1 TYPE STRING,
AUXSTORAGEDBM1 TYPE STRING,
AVGNWTIME TYPE STRING,
CPUUTILLPAR TYPE STRING,
IT_TOPSTMTS TYPE STRING,
IT_BPLIST TYPE STRING,
DS_DATA TYPE STRING,
MEMBER TYPE STRING,
MEMBER_LIST TYPE STRING,
ICON_1 TYPE STRING,
ICON_2 TYPE STRING,
ICON_3 TYPE STRING,
ICON_4 TYPE STRING,
ICON_5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2_VIEW_SUBSYS_SUMMARY_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-SUBSYSPARMS sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GLOTIMESSUM sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTPROCESSED sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTPROCCPU sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTPROCZIIP sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTSUSPENDED sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTSUSPIO sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTSUSPLOCK sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTSUSPARCH sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTSUSPDS sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTSUSPTASK sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-AVGIORESPTIME sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTRESPTIMEDB2 sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GTRESPTIMEALL sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-LOCKESCAL sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-TIMEOUTS sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-DEADLOCKS sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-LONGRUN sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-ACTLOGSHORT sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-LOGBUFF sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GCONTRATE sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-FCONTRATE sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-BPSHORT sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-GHITRATE sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-SORTWFHWM sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-REALSTORAGEDBM1 sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-AUXSTORAGEDBM1 sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-AVGNWTIME sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-CPUUTILLPAR sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-IT_TOPSTMTS sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-IT_BPLIST sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-DS_DATA sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-MEMBER sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-MEMBER_LIST sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-ICON_1 sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-ICON_2 sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-ICON_3 sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-ICON_4 sy-vline 
WA_DB2_VIEW_SUBSYS_SUMMARY_STR-ICON_5 sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.